Olathia is a community in north-central Douglas County, Missouri United States. It is located approximately six miles southeast of Mansfield along Missouri Route U and is nine miles northeast of Ava. It is on a ridge between Puncheon Camp Creek one-half mile to the northeast and Bryant Creek one and a quarter mile to the southwest.Mansfield, MO, 7.5 Minute Topographic Quadrangle, USGS, 1951 (1985 rev.)
The community has also been called Olathe and may have been named for Olathe, Kansas. The community had a post office between 1895 and 1910.
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